North Dakota Stratigraphy Archaeotherium ROCK ROCK UNIT COLUMN PERIOD EPOCH AGES MILLIONS OF YEARS AGO Common Name: Holocene Oahe .01 Pig-like mammal
Coleharbor Pleistocene QUATERNARY Classification: 1.8 Pliocene Unnamed 5 Miocene Class: Mammalia 25 Arikaree Order: Artiodactyla Family: Entelodontidae Brule Oligocene
38 South Heart Skull of the giant pig-like mammal, Archeotherium. 400 mm long. Chadron Chalky Buttes Oligocene Brule Formation. Stark County. North Dakota State Camels Butte Eocene Golden 55 Valley Bear Den Fossil Collection.
Sentinel Butte Description: TERTIARY Archaeotherium was similar in appearance to the living warthog and grew to lengths of about 4 feet. It had an elongate skull with unusual protrusions of bone on the lower jaws beneath the eyes. Bullion
Paleocene Creek These boney knobs probably provided anchors for the powerful jaw muscles. Archaeotherium mostly ate roots and tubers but
Slope with its powerful jaws and teeth could eat most anything, even
Cannonball carrion, like modern pigs. The strong shoulder and neck muscles suggest that these animals spent much of their time rooting and Ludlow 65 grubbing in the ground. Large olfactory lobes indicate that they Hell Creek had a keen sense of smell.
Fox Hills
ACEOUS Pierre CRET
84 Niobrara
Carlile
Carbonate Calcareous Shale Claystone/Shale
Siltstone Sandstone Sand & Gravel
Mudstone Lignite Glacial Drift
Archaeotherium. Painting courtesy of Simon and Schuster Publishing Company.
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